Check the listing for details. 10Pcs MAZAK BT40 Pull Stud Coolant MAZAK BT40 Retention Knob High Quality. Condition: New. Listed at 69.00 USD. 17 Years Manufacturer - CE, FDA CertificatesFactory Direct Free Shipping - About 8 Working Days Arrival No Extra Costs to Your Door - No Tariffs for US Customers 10Pcs MAZAK BT40 Pull Stud Coolant MAZAK BT40 Retention Knob High QualityFeatures 1.Each pull stud is tested thoroughly which ensures its quality2.Made from fine alloy steel 20CrMnTi with treatment to HRC53-573.Hard outside and soft inside, with higher wear resistance and better toughness4.High quality black oxide ensures long pull stud life and a non-rusting surface5.Precision turning on all critical surface6.Large selection for specific machine models, custom design accepted 10PCS in one bag If you have any questions or OEM request, please feel free to let us know.